Nozzle and water purifier with same

The invention relates to a nozzle which is provided with a body and a head. An inner runner of the nozzle extends to the head from the body, the head is provided with an axial outflow passage and a lateral outflow passage, and the sectional area of the inner runner is suddenly decreased near the junction of the body and the head. According to the nozzle, the outflow velocity of all the outflow passages of the head can be increased, when the nozzle is applied to a water purifier, the scouring action on membrane wires can be enhanced, and adhesion of dirt on the membrane wires is reduced. The invention further relates to the water purifier which is provided with the nozzle.